Polypropylene Properties

Polypropylene (PP) is a thermoplastic polyloefin material which can have several different polymer chain structures depending on the polymerisation conditions and addition of ethylene compolymer. These specific PP compounds have characteristics and properties that make them suitable for different types of pipe applications.

The chemical resistance and mechanical properties of PP Homopolymer (PP-H) pipes means they are predominantly used in industrial piping applications. PP Random copolymer pipes are used in domestic hot and cold water pressure piping systems due tho their elevated temperature and internal pressure resistance. PP Block copolymer (PP-B) has high stiffness, high impact strength and excellent chemical and abrasion resistance which makes it an ideal material for sewerage and drainage applications. Vinidex StormPRO and SewerPRO pipes are manufactured from PP-B materials.

Typical Material Properties of StormPRO® and SewerPRO® Pipe

Property

Value

Standard

Polypropylene (PP) pipe compound

block copolymer

Density

900kg/m3

ISO 1183

Flexural Modulus (2mm/min)

1300 MPa

ISO 178

Creep ratio (2 years)

3

ISO 9967

Pipe ring bending stiffness StormPRO®

8,000 N/m/m

AS/NZS 1462.22

Pipe ring bending stiffness SewerPRO®

10,000N/m/m

AS/NZS 1462.22

Coefficient of Thermal Expansion

15 x 10-5/°C

ISO 11359-2

Tensile stress at yield (50mm/min)

31 MPa

ISO 527-2

Elongation at yield (50mm/min)

8%

ISO 527-2

Poisson’s Ratio

0.45

ISO 527-2

Charpy Impact Strength- notched (+23°C)

50kJ/m2

ISO 179/1eA

Charpy Impact Strength- notched (-20°C)

5kJ/m2

ISO 179/1eA

Shore D Hardness

60

ISO 868

Melt flow rate

0.3g/10 min

ISO 1133

Melting Point

130- 170°C

Temperature

StormPRO® and SewerPRO® pipes have high temperature resistance. Continuous service temperatures of up to 60°C and short term applications of up to 90°C will not adversely affect the performance of StormPRO® and SewerPRO® pipes.

Weathering Resistance

StormPRO® and SewerPRO® pipes are manufactured from compounds containing additives which ensure their resistance to ultraviolet light and weathering during handling and storage.